Benfica stopper David Luiz has emerged as Real Madrid's top defensive target for the summer.

AS says Real see the Brazilian centre-half as a potential solution for their problems at left-back. While primarily a central defender, Luiz can also play on the left-side of defence.

Luiz's buyout clause is set at £40 million, though Benfica president Luis Filipe Vieira would seek around £18 million to sell the Brazilian.